IQR Calculator — Interquartile Range

Calculates the interquartile range (IQR) for a set of numerical data points. Users input up to fifty individual values into the tool, which then processes the dataset to determine the spread of the middle 50% of the distribution. The calculator works by first ordering the provided numbers from least to greatest and subsequently identifying the third quartile (Q3) and the first quartile (Q1). It then subtracts Q1 from Q3 to yield the precise interquartile range value, offering a robust measure of data variability that is less sensitive to outliers than standard deviation. This tool serves statisticians, data analysts, and students who are studying descriptive statistics. Professionals use it to summarize datasets quickly and assess the spread of variables without being unduly influenced by extreme scores.